As for this statement of yours: "Nothing at all about being good one week, or bad the next..." - well, I am completely gobsmacked!
You are completely taking what I responded to you with, and twisting it.
YOU keep going on about managers going from BAD to GOOD every week. Nobody else has mentioned that.
I'm not talking about players on the pitch. I am not talking about form.
I am merely responding to you saying managers go from good to bad every week.
My opinion is they don't. And I disagree. You are putting words in my mouth that I simply haven't said.

Williams actually played very well in that position when he first made the switch.
Your opinion which you are entitled to. But not mine. I felt he was weak, I felt he got easily bullied, and the bad run was down to things like Lenihan not playing, and him being the leader at the back. Which he isn't. He is a left back no matter what he thinks he is. Injury meant we had little choice to play him. But things improved dramatically (and the team performance) since he got injured. We have won every game while he hasn't been playing, and strangely enough, we look a better defensive unit. Hence we aren't now losing games. Its not a matter of opinion, that's fact.

And could you identify the games where Dack was played out of position?

Most fans who I speak to all agree, he has been dropping way too deep. Up to Barnsley last week. So covering about 10/12 games. I'd say roughly 10/12 games he has been dropping way too deep. And having no real impact on the game. Now he is scoring tap ins from 5 yards most weeks. Why? Because he is playing closer to the striker. Like last season when he was effective. You don't score 5 yard tap in's if you are dropping back to the midfield to get the ball. And also, you isolating the striker.

I notice you completely ignore DOWNING being played "out of position" and doing well!

I said it after the Brentford game. While I thought he was ok, he isn't the answer long term. In an away game up against a pacey winger, I fear he would be like Bennett, playing at RB. This has that situation written all over it. He comes in, does ok, then ends up playing there every week. Even, like Bennett at RB, if it starts costing us. He isn't the answer long-term. He is doing ok there over the last two games vrs bottom of the league and a woeful Stoke side. Don't get carried away. I'm not.

Presumably, if - as you agree - "...In any job, public services excluded, the manager is entirely responsible for the performance and results of their department...", Mowbray was also responsible for the two poor penalty decisions that cost us points this season

Someone else actually said that, take it up with them? I just agreed. Because I do agree.
I manage a team of 8 people. If one of them performs badly and it affects my team and our performance, that's MY responsibility. And I am accountable. I don't feel a highly paid football manager is exempt from this rule that applies to everyone else.

Mowbray was also responsible for the two poor penalty decisions that cost us points this season.
When and where did I say this? Or infact anyone?
He IS however responsible for picking Bennett at RB and staying with him. Bennett kept giving pens away. The manager isn't out on the pitch, making those mistakes. That's Bennett. Stop playing him out of position, where he gives pens away alot.
And now he has? Guess what, suprise suprise ....an upturn in form? And playing Bennett in his actual position? And guess what? He looks pretty solid again.
Who makes those team choices? The manager. No Bennett at RB, no pens given away. That didn't happen once, that happened quite alot.
Armstrong as a central striker? Nope, doesn't work. Play him in his best position, on the wing, where he is starting to look ok.
Playing SG as a winger, nope, doesn't work, play him as a central striker, where he will start to improve. Messing about swapping and changing the likes of Armstrong and SG.

Some, not all, fans thought there had been too much messing about going on.
Now it appears we have gone back to basics. Dack plays as a second striker, and now scores goals. A winger is a winger.